fix windows issue pre-commit (pandas-dev#37419)

Co-authored-by: Marco Gorelli <m.e.gorelli@gmail.com>

.pre-commit-config.yaml

@@ -41,7 +41,7 @@ repos:
         name: Generate pip dependency from conda
         description: This hook checks if the conda environment.yml and requirements-dev.txt are equal
         language: python
-        entry: python -m scripts.generate_pip_deps_from_conda
+        entry: python scripts/generate_pip_deps_from_conda.py
         files: ^(environment.yml|requirements-dev.txt)$
         pass_filenames: false
         additional_dependencies: [pyyaml]
@@ -102,23 +102,23 @@ repos:
     -   id: unwanted-patterns-strings-to-concatenate
         name: Check for use of not concatenated strings
         language: python
-        entry: ./scripts/validate_unwanted_patterns.py --validation-type="strings_to_concatenate"
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="strings_to_concatenate"
         files: \.(py|pyx|pxd|pxi)$
     -   id: unwanted-patterns-strings-with-wrong-placed-whitespace
         name: Check for strings with wrong placed spaces
         language: python
-        entry: ./scripts/validate_unwanted_patterns.py --validation-type="strings_with_wrong_placed_whitespace"
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="strings_with_wrong_placed_whitespace"
         files: \.(py|pyx|pxd|pxi)$
     -   id: unwanted-patterns-private-import-across-module
         name: Check for import of private attributes across modules
         language: python
-        entry: ./scripts/validate_unwanted_patterns.py --validation-type="private_import_across_module"
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="private_import_across_module"
         types: [python]
         exclude: ^(asv_bench|pandas/_vendored|pandas/tests|doc)/
     -   id: unwanted-patterns-private-function-across-module
         name: Check for use of private functions across modules
         language: python
-        entry: ./scripts/validate_unwanted_patterns.py --validation-type="private_function_across_module"
+        entry: python scripts/validate_unwanted_patterns.py --validation-type="private_function_across_module"
         types: [python]
         exclude: ^(asv_bench|pandas/_vendored|pandas/tests|doc)/
 -   repo: https://github.com/asottile/yesqa

scripts/validate_unwanted_patterns.py

@@ -432,7 +432,7 @@ def main(
     is_failed: bool = False
 
     for file_path in source_path:
-        with open(file_path) as file_obj:
+        with open(file_path, encoding="utf-8") as file_obj:
             for line_number, msg in function(file_obj):
                 is_failed = True
                 print(